Binding ring



FIG. 1 is a perspective view of a binder ring showing my new design;

FIG. 2 is a right side elevational view thereof, left side elevational view being identical;

FIG. 3 is a front elevational view thereof, rear elevational view being identical;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a binding ring, as shown and described. 